1281066706670 has 16 divisors (see below), whose sum is σ = 2305952085168. Its totient is φ = 512419568640.

The previous prime is 1281066706657. The next prime is 1281066706691. The reversal of 1281066706670 is 766076601821.

It is a super-2 number, since 2×1281066706670² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99539 + ... + 1603758.

It is an arithmetic number, because the mean of its divisors is an integer number (144122005323).

Almost surely, 2^{1281066706670} is an apocalyptic number.

1281066706670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1281066706670 is a deficient number, since it is larger than the sum of its proper divisors (1024885378498).

1281066706670 is a wasteful number, since it uses less digits than its factorization.

1281066706670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778515.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 1281066706670 in words is "one trillion, two hundred eighty-one billion, sixty-six million, seven hundred six thousand, six hundred seventy".